Hi,

I currently have a 915 D3 driver with Diamana S+ 60 X stiff shaft. I am considering going to a heavier shaft for example the Diamana S+ 70 in stiff flex or perhaps even the S+ 80 in stiff flex. Which headweights would I need to retain the standard swing weight using these two alternative shafts. The red weight is what the driver came with from Titleist.

Note: The driver is and will remain standard playing length.